<div class="input-group">
    <form method="get" id="searchform" action="<?php echo esc_url(home_url('/')); ?>">
        <input type="text" class="form-control" name="s" id="s" placeholder="<?php esc_attr_e("What do you want to find?", 'enigma'); ?>"/>
        <span class="input-group-btn">
			<button class="btn btn-search" type="submit"><i class="fa fa-search"></i></button>
		</span>
    </form>
</div>